低功耗定位作为物联网技术中的热点, 利用定位算法, 实现物联网系统的位置感知.根据不同的环境特性, 基于测距的定位方案会比无需测距的定位方案效果要好, 特别是考虑环境中的多径效应, 信号小尺度衰落等.文中提出基于SX1280芯片 (LoRa 2. 4G) 的测距方案, 定位节点自动扫描各个锚点基站, 以获取到各个锚点基站的不同距离, 利用三边定位等算法估算出定位节点的位置.测试结果可以表明LoRa定位在低功耗, 通讯距离和抗干扰能力上有很强的优势, 验证了定位方案的可行性.%It is a hot top in the area of IoT that using low power transmission technique to achieve localization. Considering the effect of fast fading and multipath transmission of the signal, the method of calculating the location based on the measurement of distance performs better than that based on other coefficients. This paper proposed a method of measuring the distance using SX1280 (LoRa 2. 4 G). The target node automatically scans all anchor base stations to obtain its distance to all anchor point and then calculates its position using trilateration localization algorithm. The results show that the method of LoRaaided localization is application and effective that consumes very low power with strong resistance to interferences.
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